Yemen's internationally recognized president, Mansur Abd al Hadi, hasn't re-entered the country, while several Iranian warships — and 9 American military vessels— are currently deployed near the country's coast.

The war between the remnants of Hadi's government — and the international military intervention led by the Saudi coalition — aren't over yet. And while it's unclear what this shift in the Saudi intervention's focus will mean for Yemen's broader conflict, it's obvious a major humanitarian catastrophe is may be in the offing so long as the fighting continues.

The war has prevented international organizations from effectively monitoring the humanitarian situation in Yemen. Nearly every international humanitarian organization has pulled their staff from the country. And on April 19, a coalition airstrike destroyed a warehouse belonging to the aid group Oxfam in the northwestern city of Sada, demonstrating the conflict's danger for existing humanitarian infrastructure.

According to Grant Pritchard, Oxfam's head of advocacy for Yemen, the warehouse contained materials "for water infrastructure — piping and so forth." Pritchard further said the contents of the warehouse had "no military value whatsoever." The bombing highlighted the perils of the Saudi-led campaign, which runs the risk of exacerbating Yemen's existing humanitarian crisis in certain ways even as it may be succeeding in countering the Iranian-backed Houthi rebels who deposed Hadi in January.

And it demonstrated that Yemen has problems that go far beyond the war: according to Pritchard, who is usually based in Yemen but spoke to Business Insider from Amman, Jordan, some 40% of Yemen's 25 million citizens lacked access to clean water even before the conflict escalated, a problem that the contents in Oxfam's destroyed warehouse were intended to help solve.

Yemen has steep food security challenges as well, which have only sharpened with the uptick in violence and the departure of most foreign aid groups (Oxfam pulled its international staffers out of Yemen a few days after the Saudi-led airstrikes began).

"What food that is available has spiraled in price," said Pritchard, noting that there have been increases of between 40% and 150% in the cost of basic foodstuffs throughout the country.

Smoke rises from an arms depot at the Jabal Hadeed military compound in Yemen's southern port city of Aden March 28, 2015. Explosions rocked Aden's largest arms depot on Saturday, sending flames and smoke into the sky above the southern Yemeni city, witnesses said.
REUTERS/Nabeel Quaiti
Ominously, the spike in prices isn't because of interrupted growing seasons or stagnant internal commerce, but because food simply can't reach the country under current conditions. Yemen imports 90% of its food, according to Pritchard, while the conflict has effectively knocked out the ports in Aden and Hudaydah — according to MarineTraffic.com, the last ship arrival in Aden was back on April 10th. Food comes into Yemen from the outside, usually by sea. But ports are shut down, and internally instability makes it incredibly difficult to move even the available food from place the place.

"Very few planes have been allowed to land, and very few ships have been able to dock," said Pritchard. "It means there is a massive shortage of essential commodities."

And that's assuming there's even fuel available — which was a questionable prospect even before the war.

"In normal times there's regular power cuts and so forth. There's obviously no electricity in many places for extended periods so people are relying on generators for hospitals and other places of importance," Pritchard said.

Eighteen of Yemen's 22 governorate have been effected by the war so far. Humanitarian organizations can't reach some 16 million people in need of aid.

The crisis in Yemen is country-wide, and multi-faceted. Even with the Houthis reportedly close to a compromise, the rebels have violated enough earlier truces to make it incredibly unlikely that there will be a comprehensive end to the conflict in the near-term.

Which means that Yemen's humanitarian situation — which was tenuous before the conflict escalated — only stands to worsen, as the safety net of external assistance has been cut.